One commonly cited benefit to animals that forage in groups is an increase in the probability
of detecting a predator, and a decrease in the time spent in predator detection. A …

The functional approach to vigilance behaviour in mammals aims at understanding how it is
influenced by natural selection, in correlation with survival chances and/or reproductive …

Over the past 30 years or so, research effort in behaviour and ecology has progressed from
simple documentation of the habits or habitats of differ ent species to asking more searching …

Many animal species live and breed in colonies. Although biologists have documented
numerous costs and benefits of group living, such as increased competition for limited …

Animal Vigilance builds on the author's previous publication with Academic Press (Social
Predation: How Group Living Benefits Predators and Prey) by developing several other …

Grouping has been widely accepted as a mechanism for protection from predation. Just as
has been apparent with predation, there is now ample evidence that parasites (biting flies …

Impala Aepyceros melampus and wildebeest Connochaetes taurinus vigilance behaviour
was concurrently monitored in two adjacent sites where re-introduction of large felids at one …

Behavioural and ecological consequences of pregnancy in a medium-sized herbivore were
examined by testing the hypothesis that pregnant females should move to areas that …

1. A general overview of position-related fitness differences in group-living animals is given
for the first time. 2. Differential fitness returns in groups are often related to competition for …

Risk of predation is considered a major influence on foraging behavior and the evolution of
social groups. We measured foraging efficiency (percentage of active time spent foraging) …